Screw-thread cleaner



Dec. 16, 1930. R. M. CORNETT SCREW .THREAD CLEANER Filed Jan. 23, 1930IN VEN TORI /0 Q6 1/ 7 Jam 27km.

' trates my invention, Fig. 1 is a plan view of an internally threadedmachine member engaged a I screw, shown in crosssectiomand two 'ofimyimproved thread cleaners mounted on". said .member and engaging thescrew, the screw thread cleaners.

Patented Dec. 16, .1930

nosnnrr 1:. co umn, or KANsAs cm, ivirssounr .scnnw-rnnnanormnnnApplication 'filedlJanuary 23, 1830ij$ria1i No. 422,964. i

My invention relates to improvements in screw thread cleaners. w

It is adapted for'useon-machines which; i

are subjective to use exposing them to large amounts of dirt, dust-orother matter which forms accretlonson screws of the machinesand makesthem difficult to turn, or for nuts on them to-turn. .VVood' workngmachines are particularly llable' to have such Taccre- .10 tionsaccumulate on their screws, such as screws used to p r verticallyadjustable tables. V v

The objector my invention isto provide a simple, cheap, novel means-forautomatically cleaning the threads of screws, which cleaning means isadapted for attachment to stationary or rotating parts fitted onstationary 'The novel features of inventionare In the accompanyingdrawing which illus- V threads being of the square type.

Fig. 2 is a side elevation, partlyibroken away of what is shown inFig. 1. 7

V type threads. Fig. 5 is a top view screw and provided with twoofmyimproved Fig. 6 is an enlarged elevation of (inter V the cleaningdevices shownlin Figsfl-to 3; Fig. 7 is an enlarged'side elevationofYone' of the 'cleanin'gdevices shown 'in'Fig. 4.

"inFig.7. a 7

Fig. 9 is an enlarged side elevation of the cleaning device havinga-cylindrical-shank and adapted for use with square threads.

Fig. 10 is a side elevation" of the device tatable, orthe -:member.

gnated by 1:. 35 F'g. 3 1s a sectlon on the line OfF1g,-'2 Fig. 4 isaview imilar to Fig, 2, h i

of a nutmounted on a Fig. 8 is anend view of the device'shown havingaicylindrical sha 'and adapted r01 V type threads.

in Fig. 10. K r Similar reference characters designatem slmilarparts'iin the different views.

l designates a vertical screw-fitted in an internallythreaded member 2,which may be r a part of a machine, and which may be, r0-

screw may be rotatable in "said In Figs'il', the threads of the screwand membery2 are shown as of the square type. TTwoholes 3 are provided,one in the upper and one in the lower side of the 'mem- Fig. 11is anendview ofthe-device'shown here,- the-outergend portions of said holes 3'tionsthereof;

ing portionb adaptedto extendbetween the threads of the screw 1 and totravel-therebe- -being larger in diameter than the inner poror rotatingscrews. Myinvention also pro- V vides for nuts fitted withi myimprovement 20 and adapted for general marketingseparatef "from screwswith which they are adapted to] g V -slidably and rotatably fitted inone of-the be .used. a

holes 3. iX F ach cleaning device has at the g Y {outer end of the shank4 aflaterally extendhereinafter fully described and claimed.

tween ior the purpose of cleaningthe threads.

The inner portion 5 is shaped to fit thegroove between the threads. Inthe. form shown in F igs. l'to' 3, the inner endfofthe portion 5 issquare in crosssectionl In the form shown in Fig'. j 4, thecorresponding portion, desige nated by 5 is wedge shapedto fit the Vshaped groove between the threads of the screw, des- The shankt of eachdevice is fitted'to slide and turnin theinner smaller endof the hole 3in which-it is mounted. V l v The member 2is provided with twohoriz'ontallthreaded holes respectively intersect- King the enlargedouter portions of the two holes 3,Figs."1 to e I v V v'V'Respe'ctivfelyfitted in these two threaded holes-are two set screws. 6, the inner endsof p which bear respectively 7 against the adjacent shanks-'4, which arerespectively provided ,with recesses: 7 inwhich the inner ends ofthescrews 6fare' respectively disposed, and

30 V wedgeshaped,as-before-, stated, so as to fit,

' L ;between the threads ofth'e screw 1.

" screws from'accidenta l turning.

not i y b g against bear against the member 2 and hold the By having theshanks eslidable martia able in the holes 3, the -shanks are easily andquickly slid into or out of the holes 3.

1; Inapplying the cleaning devices, the;

shanks 4 are slid into the holes 3' and then turned until-theportions 5enteribetween the :1

' -1, after which the lock nuts 8 are tightened, -Figs. 1 to13. 1 y ,4 1In the-formishown in Fig. (4, the constructionis similar to thatdescribed and shown; 'turning on said member. v

threads of the screw 1, following which the; set screws 6 are turned soas to respectively force the portions 5 tightly against the screw 1 inFigs. 1 to 3, excepting that the screw 1 and the internally threadedmember 2, in

which the screw 1 isfitted,-are provided with v is 'wedge shaped atThe'screws 6 are re 'spectively provided with lock nuts 8 which holdthem from slipping out of the holes in which they are mounted. V

In the form of cleaner shown in Fig. 9, the inwardly extending portion9, is shaped to fitin'a'square type thread, and the portion 10 of thecleaner shown in Figs. 10 and 11, 7 its inner end tofit a V type threadjv ThQJClBflDGIS'ShOWIl in Figs. 9 and lOmay be substituted forthoseshown in Figs. 2 and 4.- respectively, andare operable in a like manner.

Otherniodifications, within the scope of the,appendediclaims, may bemade without departiiig'fromthe spirit of my invention. ".What Iclaimis;',; Y

' 1. In a screw threadgcleaner, the combination with a screw and aninternallythreaded member fitted thereon, of a device rotatable on andslidably fitted-toand' adjustable inwardly on. said member toaithreadcleaning positionbetween. the threads of said screw,

, and means for forcing thelsaiddevice to said position and 'for holdingsaid device from .2.v Inza screw threadcleaner,thegcomb nation with ascrew and an internally threaded member-fitted thereon andhaving a hole,of

.. V type threads, and'the portions5 of the ;a device having a shankslidablydfittedginsaid thread cleaningdevices havetheir innerends- Inthe form shown in F igs ,5, ';7 and 8,

the member 2 is;a-nut.mounted on the screw :35

1", the-upper antlrlower endsiof the nuts".

hole,*said device being adjustable inwardly to a thread cleaningposition between, the

threads of said. screw, and a set screw in .said

member bearing on'and adapted to force said device-tosaid position. 1Ina screwjthread cleaner, the combina rh yingg ,ve cal'holes-3,corr p ig itionwith a screwg'andan internally threaded the holes 3 in the member2=,' ofgF igs.-ljto in which are respectively fitted ,the shanks 4];

were not provided with the recesses 7,:WhlCh' ,could be eliminated,intheformslshownin .52 5

respectivelyfitted in threaded holes in the nut and respectively bear onthe shanks 4 of the cleaning devices, .andset screws 6 are for forcingthe portions5 against the screw 1 between thefthreads of the latter, ashas; been described with reference to the set screws bearing square incross .section. j This permits the screws 6 to reliably hold ".theshanks from turning in the holes 3 even though .the shanks The shanks 4,as shown in Figsnlto 7 are.

Figs. 1 to 8, wit h the elimination, however,

' of the function ofholding the shanks 4 from slipping out of the holes3', when the set;

"screws are not tightened sufliciently to bind: on the shanks, as beforethe screws 1 and 1 are 60 fitted in themembers 2 and 2 respectively.

- In the forms-shown in Figs. 9,10 and .11, the shanks 4' arecircular incross section, so

"that the side recesses 7 therein are required for receiving the setscrews, so as to'hold :the shanks 1' from turning, as wellas to,

member fitted thereon and having a hole, of a device slidably androtatably fitted in said hole and adjustable inwardly to a threadcleaning position between the threads of said 5 screw, and a setscrewinsaid member bearng on said device and adapted to force saiddevice tosaid position and to.holdfsa1d;de-

vice from sliding orturningin said hole. V

1.. In a screw thread cleaner, the combination with a screw and aninternally threaded member fitted thereon and having a,hole, of a devicehaving a -ishank slidably androtatably fittedin said hole and havingalateral recess, said devicebeing adjustable inwardly to; .afthreadcleaning position between the threadsof said screw, and a. set. screw.in said meinber and enteringsaid recess and bearing on saidishank.tor-holding the latter from turning and from sliding andyadaptedtd forcesaid device to said position. f 5. In a screw'thread cleaner, thecombination with. a screw and an internally threaded me'mberlfittedthereon andhaving-a hole, of a device having a shank other thancircular" in cross section slidably and rotatably" fitted insaid hole,said device beingadjustable inwardly-to a thread cleaning positionbetween thethreads of said screw, and a set screw in said member bearingagainst one side of said shank and adapted to force said device to saidposition and to hold theshank from turning.

6. In a screw thread cleaner; the combina- ,tion with a screw and aninternally threaded member fitted thereon and having a holehaving anenlarged outer portion, of a device having a shank slidahly androtatably fitted in the smaller portion of said'hole, said devicebeingadjustahle inwardly to a thread clean- Y ing position between thethreads of said screw, and a set screw in said member bearing againstsaid shank in the enlarged portion of said hole and adapted to forcesaid device to said position.

In testimony whereof I have signed my name to this specification.

ROBERT Moonnnrr. Y y 1

